Worksheet: Vaccinations

In this worksheet, we will practice explaining the mechanism of vaccinations, and describing the concept of herd immunity.

Q1:

What molecules on the surface of a pathogen in a vaccine stimulate an immune response?

  • ALymphocytes
  • BAntibodies
  • CAntitoxins
  • DAntigens
  • EAntipathogens

Q2:

Which of the following statements best describes herd immunity?

  • AHerd immunity is the prevention of large outbreaks of a disease by having 100% of the population vaccinated.
  • BHerd immunity is the prevention of small outbreaks of a disease by having the minority of the population vaccinated.
  • CHerd immunity is the prevention of large outbreaks of a disease by having the majority of the population vaccinated.
  • DHerd immunity is the prevention of large outbreaks of a disease by the majority of a population having a natural resistance to it.
  • EHerd immunity is the prevention of large outbreaks of a disease by having the majority of animals, such as cattle and sheep, vaccinated.

Q3:

Fill in the blanks: Cells in the immune system that remember antigens and provide a quicker immune response when the body is infected a second time are called .

  • Amemory lymphocytes
  • Brecall lymphocytes
  • Crecall erythrocytes
  • Dremembering lymphocytes
  • Ememory erythrocytes

Q4:

Diphtheria is a waterborne disease that can be vaccinated against. In 1989, there were 839 cases of diphtheria in the USSR. In 1994, there were 50,000 reported cases. What is the percentage increase? Give your answer to 4 significant figures.

  • A 5,859%
  • B 4,916%
  • C98.32%
  • D0.9832%

Q5:

What molecules are released by white blood cells in response to a specific pathogen?

  • AAntiseptics
  • BAntigens
  • CAntibodies
  • DAntibiotics
  • EAntivirals

Q6:

Measles is a highly infectious disease that can be fatal. In 2017, 42 people died from measles in Europe. In 2018, this number rose to 72. What is the percentage increase? Give your answer to two significant figures.

  • A71%
  • B1.7%
  • C30%
  • D42%

Q7:

What cells in the body recognize and respond to the pathogens in a vaccine?

  • AAntigens
  • BAntibiotics
  • CLymphocytes
  • DErythrocytes
  • ERed blood cells

Q8:

The graph provided shows the proportion of measles infections prevented relative to the percentage of children in a population that have been immunized against measles.

Which of the following best describes the trend shown by the graph?

  • AThere is no correlation between the percentage of children immunized and the number of infections prevented.
  • BThe higher the percentage of children immunized, the higher the number of infections prevented.
  • CThe lower the percentage of children immunized, the higher the number of infections prevented.
  • DThe higher the percentage of children immunized, the lower the number of infections prevented.

How do the results shown support the idea of herd immunity?

  • AIf the majority of the population is immunized, the risk of infection is higher.
  • BIf the minority of the population is immunized, the risk of infection is lower.
  • CIf the majority of the population is immunized, the risk of infection is lower.
  • DThere is no link between the results and the idea of herd immunity.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.